US20100058056A1 - Display system with security enhancement function - Google Patents
Display system with security enhancement function Download PDFInfo
- Publication number
- US20100058056A1 US20100058056A1 US12/150,267 US15026708A US2010058056A1 US 20100058056 A1 US20100058056 A1 US 20100058056A1 US 15026708 A US15026708 A US 15026708A US 2010058056 A1 US2010058056 A1 US 2010058056A1
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- United States
- Prior art keywords
- security code
- display system
- display
- flat panel
- security
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- Abandoned
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/88—Detecting or preventing theft or loss
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
- G06F21/79—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data in semiconductor storage media, e.g. directly-addressable memories
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/82—Protecting input, output or interconnection devices
- G06F21/84—Protecting input, output or interconnection devices output devices, e.g. displays or monitors
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/08—Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/026—Arrangements or methods related to booting a display
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/12—Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2370/00—Aspects of data communication
- G09G2370/04—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
- G09G2370/045—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller using multiple communication channels, e.g. parallel and serial
- G09G2370/047—Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller using multiple communication channels, e.g. parallel and serial using display data channel standard [DDC] communication
Definitions
- the present invention relates to a display system that typically includes a flat panel display (FPD) and a host connecting to the flat panel display, with the FPD and the host cooperating such that the display system has a security enhancement function.
- FPD flat panel display
- flat panel displays that are light and thin and have low power consumption characteristics have been widely used in office automation equipment, video units, and the like.
- flat panel displays may be easily stolen.
- flat panel displays can be easily taken away from their proper location and used elsewhere without authority.
- a display system includes a flat panel display and a host connectable to the fiat panel display.
- the fiat panel display includes a first storage unit including a first security code stored therein, a register, and a micro processing unit.
- the host includes a second storage unit including a second security code stored therein, and a central processing unit.
- the central processing unit is configured for converting the second security code to a digital signal and sending the digital signal to the register.
- the micro processing unit is configured to read and compare the first security code with the digital signal in the register, and output a control signal according to a result of the comparison.
- the drawing is a block diagram of a display system according to an exemplary embodiment of the present invention.
- the display system 1 includes a host 11 and a flat panel display 15 .
- the host 11 includes a CPU (central processing unit) 111 , an HDD (hard disk driver) 113 , and a graphic adapter 117 .
- the flat panel display 15 includes a register 150 , an MPU (micro processing unit) 151 , a firmware unit 152 , a security code storage unit 153 , an OSD (on screen display) control interface 154 , an OSD menu control unit 155 , an OSD menu generating unit 156 , a graphic output unit 157 , and a display interface 158 .
- the CPU 111 of the host 11 can process and send digital signals to the graphic adapter 117 .
- the graphic adapter 117 receives and converts the digital signals to corresponding graphic signals, and sends the graphic signals to the graphic output unit 157 of the flat panel display 15 .
- the graphic output unit 157 receives and processes the graphic signals, and sends the processed graphic signals to the display interface 158 .
- the OSD control interface 154 can for example include a group of control buttons (not shown).
- the control buttons can be touched or pressed by a user from outside of the flat panel display 15 . That is, the control buttons can generate demand signals according to corresponding external operations of a user.
- a security enhancement function of the display system 1 can be activated or deactivated according to operations applied to the OSD control interface 154 by an authorized user.
- the OSD menu control unit 155 can control corresponding items and functions according to the demand signals received from the OSD control interface 154 .
- the OSD menu generating unit 156 can output OSD display signals according to control signals received from the OSD menu control unit 155 .
- the OSD display signals are output to the display interface 158 so that the display interface 158 displays corresponding OSD menus.
- the firmware unit 152 includes a first security program, a POST (power-on self test) program, and a security mark stored therein.
- the firmware unit 152 can for example be an EEPROM (electrically erasable programmable read-only memory) unit.
- the security enhancement function When the security enhancement function is activated, the MPU 151 receives a notification signal from the OSD menu control unit 155 , and the security mark is set as valid.
- the security code storage unit 153 includes a first security code stored therein in the form of plain text. If the security mark is valid, the MPU 151 starts the POST program when the flat panel display 15 is powered on, detects the security mark, and periodically runs the first security program.
- the HDD 113 includes a second security program installed therein, and a second security code stored therein.
- the second security code is an encrypted code of the first security code. That is, the second security code corresponds to an encrypted form of the first security code.
- the CPU 111 runs the second security program periodically. A period between runnings of the second security program is less than a period between runnings of the first security program.
- the CPU 111 reads the second security code from the HDD 113 , decrypts the second security code, and sends the decrypted second security code to the register 150 .
- the MPU 151 When the first security program is run, the MPU 151 reads the first security code from the security code storage unit 153 , and compares the first security code with the decrypted second security code in the register 150 . If the first security code matches the decrypted second security code, the MPU 151 outputs a normal work signal to make the flat panel display 15 normally operable, and deletes the decrypted second security code from the register 150 . If the first security code does not match the decrypted second security code, the MPU 151 rereads the first security code and re-compares the first security code with the decrypted second security code.
- the MPU 151 If the first security code continuously does not match the decrypted second security code a predetermined threshold number of times, for example three times, the MPU 151 outputs a confirmation signal to the OSD menu control unit 155 .
- the OSD menu control unit 155 receives the confirmation signal, and the OSD menu generating unit 156 generates a corresponding OSD menu displayed on the display interface 158 to prompt the user to input whether the second security program is properly installed and whether the proper second security code is stored.
- the user may, by appropriate input, confirm that the second security program is properly installed and that the proper second security code is stored. If so a prompt result input by the user and sent to the MPU 151 is positive, and the flat panel display 15 restarts to display normally.
- the MPU 151 If a prompt result is negative, the MPU 151 outputs a shut down signal to shut down the flat panel display 15 . In one embodiment, if a positive prompt result is not achieved within a predefined period of time, the MPU 151 automatically determines that the prompt result is negative.
- DDCCI display data channel command interface
- DDCCI protocol can realize OSD operations displayed by the flat panel display 15 by allowing external input devices (e.g., a keyboard or mouse, not shown) to convey a user's instructions to the display system 1 . That is, the security enhancement function of the display system 1 can be activated or deactivated and the first security code and the second security code can be modified via DDCCI protocol.
- the first security code and the second security code can be modified as follows.
- a security code modification signal is sent to the CPU 111 from the OSD control interface 154 , the CPU 111 generates a dialogue displayed on the display interface 158 .
- the CPU 111 reads and decrypts the current second security code.
- the current first security code is compared with the decrypted current second security code. If the current first security code matches the decrypted current second security code, the new first security code replaces the current first security code stored in the firmware unit 152 , and is correspondingly encrypted and stored in the HDD 113 to replace the current second security code. If the current first security code does not match the decrypted current second security code, the current first security code and the current second security code are maintained, and the new first security code is disregarded by the CPU 111 .
- the security mark can be preset to be invalid when the first security code is null; i.e. when the security code storage unit 153 does not include a first security code.
- the host 11 can send a proper decrypted second security code to the register 150 , and the flat panel display 15 can be operated normally if the first security code matches the decrypted second security code.
- the register 150 cannot receive a second security code, and/or cannot receive the proper decrypted second security code.
- a comparison between the first security code and a decrypted second security code of the other host cannot be made by the MPU 151 , and/or a comparison between the first security code and a decrypted second security code of the other host yields a “no match” result.
- the MPU outputs a confirmation signal to the OSD menu control unit 155 .
- the OSD menu control unit 155 receives the confirmation signal, and controls the OSD menu generating unit 156 to generate a corresponding OSD menu displayed on the display interface 158 to prompt a user to confirm whether the second security program is properly installed in the other host and whether the proper second security code is stored in the other host.
- an unauthorized user of the flat panel display 15 cannot access the second security program of the host 11 , and/or cannot access the particular second security code of the host 11 .
- a prompt result is negative, and the MPU 151 outputs a power-off signal to shut down the flat panel display 15 .
- the security enhancement function when the security enhancement function is activated, the first security program is periodically run, and the first security code stored in the flat panel display 15 is compared with the decrypted security second code stored in the register 150 . If the flat panel display 15 is stolen or is connected to another host without the second security program properly installed therein and/or without the proper second security code stored therein, the new display system constituted by the flat panel display 15 and the other host cannot pass the security comparison. Thus, the flat panel display 15 cannot be operated normally. It is believed that such kind of display system 1 with the above-described security enhancement function can help deter people from stealing the flat panel display 15 or using the flat panel display 15 without authorization. That is, the security enhancement function makes the display system 1 including the flat panel display 15 more secure.
- the flat panel display 15 of the display system 1 may instead be another kind of display, for example, a CRT (cathode ray tube) display.
- a CRT cathode ray tube
Abstract
Description
- The present invention relates to a display system that typically includes a flat panel display (FPD) and a host connecting to the flat panel display, with the FPD and the host cooperating such that the display system has a security enhancement function.
- Recently, flat panel displays that are light and thin and have low power consumption characteristics have been widely used in office automation equipment, video units, and the like. However, because of their portability and low weight, flat panel displays may be easily stolen. For similar reasons, flat panel displays can be easily taken away from their proper location and used elsewhere without authority.
- What is needed, therefore, is a display system that can circumvent, overcome or at least mitigate the above-described problems.
- In an exemplary embodiment, a display system includes a flat panel display and a host connectable to the fiat panel display. The fiat panel display includes a first storage unit including a first security code stored therein, a register, and a micro processing unit. The host includes a second storage unit including a second security code stored therein, and a central processing unit. The central processing unit is configured for converting the second security code to a digital signal and sending the digital signal to the register. The micro processing unit is configured to read and compare the first security code with the digital signal in the register, and output a control signal according to a result of the comparison.
- Other aspects, novel features and advantages will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
- In the drawing, like reference numerals designate corresponding parts.
- The drawing is a block diagram of a display system according to an exemplary embodiment of the present invention.
- Reference will now be made to the drawing to describe various embodiments of the present invention in detail.
- Referring to the drawing, a
display system 1 according to an exemplary embodiment of the present invention is shown. Thedisplay system 1 includes ahost 11 and aflat panel display 15. Thehost 11 includes a CPU (central processing unit) 111, an HDD (hard disk driver) 113, and agraphic adapter 117. Theflat panel display 15 includes aregister 150, an MPU (micro processing unit) 151, afirmware unit 152, a securitycode storage unit 153, an OSD (on screen display)control interface 154, an OSDmenu control unit 155, an OSDmenu generating unit 156, agraphic output unit 157, and adisplay interface 158. - The
CPU 111 of thehost 11 can process and send digital signals to thegraphic adapter 117. Thegraphic adapter 117 receives and converts the digital signals to corresponding graphic signals, and sends the graphic signals to thegraphic output unit 157 of theflat panel display 15. Thegraphic output unit 157 receives and processes the graphic signals, and sends the processed graphic signals to thedisplay interface 158. - The
OSD control interface 154 can for example include a group of control buttons (not shown). The control buttons can be touched or pressed by a user from outside of theflat panel display 15. That is, the control buttons can generate demand signals according to corresponding external operations of a user. A security enhancement function of thedisplay system 1 can be activated or deactivated according to operations applied to theOSD control interface 154 by an authorized user. The OSDmenu control unit 155 can control corresponding items and functions according to the demand signals received from theOSD control interface 154. The OSDmenu generating unit 156 can output OSD display signals according to control signals received from the OSDmenu control unit 155. The OSD display signals are output to thedisplay interface 158 so that thedisplay interface 158 displays corresponding OSD menus. - The
firmware unit 152 includes a first security program, a POST (power-on self test) program, and a security mark stored therein. Thefirmware unit 152 can for example be an EEPROM (electrically erasable programmable read-only memory) unit. When the security enhancement function is activated, the MPU 151 receives a notification signal from the OSDmenu control unit 155, and the security mark is set as valid. The securitycode storage unit 153 includes a first security code stored therein in the form of plain text. If the security mark is valid, the MPU 151 starts the POST program when theflat panel display 15 is powered on, detects the security mark, and periodically runs the first security program. - The HDD 113 includes a second security program installed therein, and a second security code stored therein. The second security code is an encrypted code of the first security code. That is, the second security code corresponds to an encrypted form of the first security code. When a starting signal is input to the
CPU 111, theCPU 111 runs the second security program periodically. A period between runnings of the second security program is less than a period between runnings of the first security program. When thedisplay system 1 is powered on, theCPU 111 reads the second security code from theHDD 113, decrypts the second security code, and sends the decrypted second security code to theregister 150. - When the first security program is run, the MPU 151 reads the first security code from the security
code storage unit 153, and compares the first security code with the decrypted second security code in theregister 150. If the first security code matches the decrypted second security code, the MPU 151 outputs a normal work signal to make theflat panel display 15 normally operable, and deletes the decrypted second security code from theregister 150. If the first security code does not match the decrypted second security code, the MPU 151 rereads the first security code and re-compares the first security code with the decrypted second security code. If the first security code continuously does not match the decrypted second security code a predetermined threshold number of times, for example three times, theMPU 151 outputs a confirmation signal to the OSDmenu control unit 155. The OSDmenu control unit 155 receives the confirmation signal, and the OSDmenu generating unit 156 generates a corresponding OSD menu displayed on thedisplay interface 158 to prompt the user to input whether the second security program is properly installed and whether the proper second security code is stored. For example, the user may, by appropriate input, confirm that the second security program is properly installed and that the proper second security code is stored. If so a prompt result input by the user and sent to theMPU 151 is positive, and theflat panel display 15 restarts to display normally. If a prompt result is negative, the MPU 151 outputs a shut down signal to shut down theflat panel display 15. In one embodiment, if a positive prompt result is not achieved within a predefined period of time, theMPU 151 automatically determines that the prompt result is negative. - Typically, a protocol called DDCCI (display data channel command interface) protocol is utilized for communication between the
host 11 and theflat panel display 15. DDCCI protocol can realize OSD operations displayed by theflat panel display 15 by allowing external input devices (e.g., a keyboard or mouse, not shown) to convey a user's instructions to thedisplay system 1. That is, the security enhancement function of thedisplay system 1 can be activated or deactivated and the first security code and the second security code can be modified via DDCCI protocol. - The first security code and the second security code can be modified as follows. When a security code modification signal is sent to the
CPU 111 from theOSD control interface 154, theCPU 111 generates a dialogue displayed on thedisplay interface 158. When the current first security code and a new first security code are input, theCPU 111 reads and decrypts the current second security code. The current first security code is compared with the decrypted current second security code. If the current first security code matches the decrypted current second security code, the new first security code replaces the current first security code stored in thefirmware unit 152, and is correspondingly encrypted and stored in theHDD 113 to replace the current second security code. If the current first security code does not match the decrypted current second security code, the current first security code and the current second security code are maintained, and the new first security code is disregarded by theCPU 111. - For further security, the security mark can be preset to be invalid when the first security code is null; i.e. when the security
code storage unit 153 does not include a first security code. - When the
flat panel display 15 is connected to thehost 11, thehost 11 can send a proper decrypted second security code to theregister 150, and theflat panel display 15 can be operated normally if the first security code matches the decrypted second security code. - When the
flat panel display 15 is connected to another host (not shown) without the second security program installed therein and/or without the second security code stored therein, theregister 150 cannot receive a second security code, and/or cannot receive the proper decrypted second security code. Thus a comparison between the first security code and a decrypted second security code of the other host cannot be made by theMPU 151, and/or a comparison between the first security code and a decrypted second security code of the other host yields a “no match” result. In either case, the MPU outputs a confirmation signal to the OSDmenu control unit 155. The OSDmenu control unit 155 receives the confirmation signal, and controls the OSDmenu generating unit 156 to generate a corresponding OSD menu displayed on thedisplay interface 158 to prompt a user to confirm whether the second security program is properly installed in the other host and whether the proper second security code is stored in the other host. In general, an unauthorized user of theflat panel display 15 cannot access the second security program of thehost 11, and/or cannot access the particular second security code of thehost 11. Thus a prompt result is negative, and theMPU 151 outputs a power-off signal to shut down theflat panel display 15. - In summary, in the
display system 1, when the security enhancement function is activated, the first security program is periodically run, and the first security code stored in theflat panel display 15 is compared with the decrypted security second code stored in theregister 150. If theflat panel display 15 is stolen or is connected to another host without the second security program properly installed therein and/or without the proper second security code stored therein, the new display system constituted by theflat panel display 15 and the other host cannot pass the security comparison. Thus, theflat panel display 15 cannot be operated normally. It is believed that such kind ofdisplay system 1 with the above-described security enhancement function can help deter people from stealing theflat panel display 15 or using theflat panel display 15 without authorization. That is, the security enhancement function makes thedisplay system 1 including theflat panel display 15 more secure. - In alternative embodiments, the
flat panel display 15 of thedisplay system 1 may instead be another kind of display, for example, a CRT (cathode ray tube) display. - It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the examples hereinbefore described merely being preferred or exemplary embodiments of the invention.
Claims (20)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN200710074211.X | 2007-04-25 | ||
CN200710074211XA CN101295469B (en) | 2007-04-25 | 2007-04-25 | LCD device, personal computer and LCD device anti-theft method |
Publications (1)
Publication Number | Publication Date |
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US20100058056A1 true US20100058056A1 (en) | 2010-03-04 |
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ID=40065716
Family Applications (1)
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US12/150,267 Abandoned US20100058056A1 (en) | 2007-04-25 | 2008-04-25 | Display system with security enhancement function |
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US (1) | US20100058056A1 (en) |
CN (1) | CN101295469B (en) |
Cited By (4)
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CN102567017A (en) * | 2011-12-15 | 2012-07-11 | 深圳市九洲电器有限公司 | Method and device for simple implementation of OSD (on-screen display) interface output |
US20130162584A1 (en) * | 2011-12-22 | 2013-06-27 | Lars Persson | User Interface Responsiveness in an Electronic Device Having a Touch Screen Display |
US20140229339A1 (en) * | 2011-05-25 | 2014-08-14 | Orange | Method of using a user device for remote payment of a shopping basket on a merchant server, and an associated system |
US20150143400A1 (en) * | 2008-09-29 | 2015-05-21 | The Nielsen Company (Us), Llc | Methods and Apparatus for Determining the Operating State of Audio-Video Devices |
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CN102522062B (en) * | 2011-12-01 | 2013-12-04 | 深圳市洲明科技股份有限公司 | Encryption system of light emitting diode (LED) display screen |
CN103729592A (en) * | 2013-12-26 | 2014-04-16 | 京东方科技集团股份有限公司 | Electronic device and starting method of function interface of electronic device |
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CN101295469A (en) | 2008-10-29 |
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